After checkbox is checked:

After this point, changes in checked state have no effect.

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I do not see this magic checkbox; not here, not on Stack Overflow, not on Gaming where I have a ♦. How do you find this thing? It's actually a fairly desirable item.
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Grace Note♦Mar 24 '11 at 13:50

I don't think it's a shop, I want to know how I can get this magic checkbox. It'll really make my life easier on Gaming, so I'm curious why you have it and I cannot find it at all.
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Grace Note♦Mar 24 '11 at 13:56